That sounds interesting, which of the 59 national parks would you want to visit?
That could be fun!  The United States has 59 protected areas known as national parks that are operated by the National Park Service
I want to buy a pass and visit all the national parks in the US.
The United States has 59 protected areas known as national parks that are operated by the National Park Service, an agency of the Department of the Interior.
Я хочу купить пропуск и посетить все национальные парки США.
В Соединенных Штатах насчитывается 59 охраняемых территорий, известных как национальные парки, которые находятся в ведении Службы национальных парков, агентства Министерства внутренних дел.